- s.required_ruby_version = '>= 2.1.0'
- s.add_runtime_dependency 'arvados', '~> 1.3.0', '>= 1.3.0'
+ s.required_ruby_version = '>= 2.5.0'
+ # Note the letter 'a' at the end of the version dependency. This enables
+ # bundler's dependency resolver to include 'pre-release' versions, like the
+ # ones we build (but not publish) on every test pipeline job.
+ # See: https://github.com/rubygems/bundler/issues/4340
+ s.add_runtime_dependency 'arvados', '~> 2.7.0.rc1'